The one shown in Fig. 36 from Priest Rapids is in the collection of Mrs. Hinman. The convex ends of this cylindrical form present the natural surface of a pebble and they are not battered. The material is a yellowish quartzite or closely allied rock. It is 457 mm. long, 75 mm. in diameter and the entire cylindrical surface has been pecked apparently to bring it to form. If it had been used as a pestle the ends would show the signs of battering or grinding. The cylindrical surface does not seem to show any signs of its having been used as a roller or grinder. It may possibly be a pestle in process of manufacture although it seems very strange that so much work should have been expended on the cylindrical surface in a region where natural pebbles very nearly of this shape were common.[112] The specimen shown in Fig. 37 is apparently made of basalt and was found on the surface about a mile east of Fort Simcoe. The ends are considerably chipped and one of them has apparently been somewhat battered since. If the object were used as a pestle the chipping of the ends is unusually great. The cylindrical surface has been formed by pecking except in one place where the natural surface shows. This bit of natural surface is such that it suggests the specimen to have been made of a prismatic basaltic column. While these two specimens may have been intended for pestles, it seems possible that they were made for rollers. Several such objects made of stone were seen in Mr. Owen's collection. He says that they were used like rolling pins for crushing camas and kouse roots in making bread. Both of these roots were extensively used in the Nez Perce region to the east.[113] [112] Museum negative no. 44537, 9-3. [113] Spinden, pp. 201-203. [Illustration: Fig. 38 (202-8157). Fragment of Hearth of Fire Drill. From Grave No. 10 (5) in a rock-slide about half a mile above the mouth of Naches River. 1/2 nat. size.] _Fish Knives._ No fish knives made of slate were found, as in the Thompson River region, at Lytton,[114] rarely at Kamloops,[115] and commonly on the coast at Fraser Delta,[116] Comox,[117] and Nanaimo.[118] [114] Smith, (d), p. 140. [115] Smith, (c) p. 414. [116] Smith, (a), p. 159. [117] Smith, (b), p. 315. [118] P. 345, _ibid._